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This error happens on both Unity 3D and Unity 2D. I tried unity --reset command but it doesn't fix the error. Gnome shell properly shows all three buttons minimize maximize and close. But Unity doesn't show it properly. How to fix this error?

Here's the screenshot:

enter image description here

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What do you get for this command? gsettings get org.gnome.desktop.wm.preferences button-layout – jokerdino Aug 31 '12 at 4:51

Open a terminal with CTRL + ALT + T shortcut and type the below command and then hit Enter, it should fix the problem.

gsettings reset org.gnome.desktop.wm.preferences button-layout
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